ER 630 (17-4 PH) is used primarily in the aerospace and other high-technology industries. The nominal composition (wt.-%) of this classification is 16.4 Cr, 4.7 Ni, 3.6 Cu. The composition is designed primarily for welding ASTM A 564 Type 630 and some other precipitation-hardening stainless steels. The composition is modified to prevent the formation of ferrite networks in the martensitic microstructure which have a deleterious effect on mechanical properties. Dependent on the application and weld size, the weld metal may be used as-welded; welded and precipitation hardened; or welded, solution treated, and precipitation hardened.

Please Note: Welding fumes and gases can be hazardous to your health. Click here for the manufacturers MSDS information. Both the manufacturer and Welding Supplies from IOC recommends that you read and understand the Material Safety Data Sheets and product warning statements prior to using this product.